Manufacture of carbon black



Patented ea. 4, 193 2 GEORGE CHARLES LEWIS, OF NEW IDORP, NEW YORK, ASSIG'NOR TO COLUMBIAN CARBON COMPANY, OF NEW-YORK, N. Y., A CORPORATION OF DELAWARE nanuracruan or cannon BLACK Application filed. October 1, 1930. Serial No. 485,582. I

This invention relates to the manufacture of carbon black and constitutes an improvement in the apparatus and process shown and broadly claimed in my I]. S. Patent 1 1,510,485, in which the quantities of the carbon black are increased and the quality improved by the passage of an electric current through the flame from which the carbon is deposited.

the usual practice to cause a gas burner to impinge on a depositing surface having a lower temperature than the temperature of the flame, so that carbon black is condensed thereon. In the specific form illustrated in said Patent 1,510,485, the carbon forming flame had a metal rod extending through the flame at a distance from the depositing plate, and at a point just above the point of maximum heat. The depositing plate and rod were connected to a suitable source of electric energy so that the current passed therebetween in the flame. This rod in operation was moved endwise in order to facilitate the removal of the carbon black deposited thereiii on. r One object of the present invention is to provide a simpler process and arrangement for electrifying the carbon forming flame.

-Another object'is to provide an electrode of the electric current which is less apt to have carbon deposited thereon, and which therefore need not be mechanically moved back and forth through the flame. f A further object of the present invention is to provide an electrode at a position 7 whereby the current is emitted from a point so that better discharge of current is effected.

' In a specific embodiment of the present invention, an electrode in the form of a clip or wire is provided which may advantageously have electrical contact with a pipe line, so that the latter constitutes a main conduit for a plurality of burners extending therefrom; The current-discharging portion of the clip or wire in order to obtain favorable results should reach little if any further than the tip or slot of the burner.

In this position the current discharging p0r 'densation of any. carbon black thereon. L10 In the production of carbon black it is tion of the clip would be disposed inthe blue region of the flame where there is less tend: ency to formcarbon black.

The tip of the burner may be made of any suitable material. However, it has been found advantageous to use a lava tip which is less subjected to radiation and which will retain its heat sufficiently to obviate the con- 7 The invention consists'in the new and improved features of construction and the new and improved arrangements and combinations of steps in the process hereinafter described and more particularly set forth in the claims. p

Although the novel features which are believedto be characteristic of' this invention will be particularly pointed out in the appended claims, the invention itself, as to its objects and advantages, the mode of its operation and the manner of its organization may be better understood by referring to the following description taken in connection with the accompanying drawlng forming a part thereof, in which the single figure is a some- 7. what diagrammatic perspective view of an apparatus constructed in accordance with my invention.

, In practice there are provided a plurality of depositing plates or members, although I have illustrated but one in the form of channels 10. The usual means for moving them back and forth endwise and for supporting and" guiding them, and forbrushing off the deposited'black, have'not been illustrated, as they may be constructedin accordance with the usual practice or as shown in my prior patent above referred to. Beneath each channel are a plurality of burners 16 so positioned'that theupper por- 'tion of-the flame emitted from each burner plays on the under surface of the plate forming the bottom of the channel. The burners for each channel may be arranged ina row along a gas pipe 15, which suppliesall of the burners. Each of the burners 16 has a tip 17 provided with a slot 18 to effect a fan-shaped flame. j

As the important each of said burners feature of my invention 16 has an electrode m na t V V 'The tip 17 may be-made of any compost It-ion. However, 'to'use a lav-a tip which will retain: its heati should also be noted. that manufacture.

- may be made by those skilled in the Quti ep r ing om he p r t o t n e preferably through the flame,

which may take the form of a clip or wire19 having one portion or end thereof secured to a source of electric current. The terminal tion as the direction of the flame from the burner 16, It, is advantageous to, have the terminalfor current discharging end of each clip extend but little. further than the slo 18. In this way the electrode or polewill" beidsposed in the blue region of'theflame where thereiisless tendency for carbon blaekii or soot to collect thereon. 1 e v g Although the electrodes 19'- maybe con nected to a current supply Wire, thepipe line 15 preferably serves as" one conductor and the channel as the other. As shown, a source of electrical energy 20 has one terminal thereof connected to the channel 10 so that the latter. forms one electrode, and the other terminal connected to the main pipe line 15 and through it to the electrodes 19. Each-of the electrodes 19 has an electricalconnection with saidpipelines r V f Y It should be understood that the supports for the various members of opposite polarity 1'1-1-Ll3tbe'SOflIISIZIlQtQd from each other as. to prevent, the flow;

so that all of the: current flows through 'theflame and lengthwise of the latter. Preferably'the channel 10 is connected 'to the positive terminal ofthe source, and" the pipe 15 to. the negative; terithas been foundfavorable .suificiently to obviate the condensation of ca rbon black thereon, I may make the tip -of metal in whichcaseithe tip itself serves as the electrode and the clip or-separate electrode maybe; omitted, Onesuch metal tip 17a is illustrated; r

It should be noted that in the present in ye'ntionwanydisturbance ofjthelfl'ame by the action ofanyparts moving therethrough,

other than ,the} channel, is obviated, It

a better current discharge is e i'ected from the; point of the electrode instead or from the side of I a wire or rod, and the; possibility ofadepositionof any carbon black on the electrode is minimized. V A lesser-(number of parts are I re quired, so that thea-pparatus is cheaper to There are fewer mov ing parts, so that less power isirequired and there is less liability of getting out of ordie 7 tion have been shown and described and, are pointed out in the annexed claims, it willbe understood that various. omissions, substitutions and changes in the'forms. and details f v bycurrent is passed ofthe' device illustrated, and in its operation, art with extends in the same general direc- V for passing electricscurrent through the icu-rrent-dischar'ging end thereof 'eirtexlding in of .the current except.

VHaving thus described my invention, what I claim as new. and desire to secure by Letters Patent is: 1

1. Anfapparatus for producing carbona- V ceous deposits from a flame, including means flame; -a df m sjin ng a? d p s in sur-r face'connected to one pole of a source of electrical current, and a wire connected to the op osite: pole or -said source having the a; direction substantially in the direction of propagation oftlie flame, said end being disjv posed near the source of origin of said flame.

2; An 'apparatusfor producing carbonaceous deposits from a flame, including ametal member on which the fiame plays and upon I which thecarbonblac k isdeposited; a gas burner having a tip for producing a flame, meansfor passing an electric cu'rrentthrough the flame, said means including a wire connected to one poletof a source of electriccurrent and having the current discharging end thereof disposed closely adjacent to the. tip, andmeans for connecting-{said member to the opposite-pole 'of said.source. f 1 f 3. An "apparatus" for. producing carbonaeeous deposits from a flame,including a metal member on wh-ich'the flame plays and upon which the carbon black is deposited, a: gas 7 burner havinga lava tip at the end thereof for producing-a flame, an electrode having the currentrdischarging end thereof terminating closely adjacent tothe'tip, and meansfor con necting saidelectrode and said metalmember Q00 to-the oppositepoles of a source of the electricalenergy. m 7

4:. An apparatus for making carbon black, including a gas; supplypipe having a. pluralit cf burner tips of insulating material, a collecting member for the carbon black on whic the'flames play, a source of electrical energy connecwted toqsaid member and said pipe, and a: plurality: of. electrodes cennected-.-to said-pipe, and'each terminating at theiupp'er end of a separate tip. P i 5. An apparatusfor making carbon black,

including a gas supplypipe having; a pluflame between said pipe and said member,

'6. An apparatusfor making carbon black, o r includingajcollectinginember, a plurality-of hile certain novel features of the inventhereon, and each having a separate electrode closely adj acent 1 thereto, and means 'for con.-

necting said electrodes in pa'rallel withfieach other'and in series with saidmember, "wherethrough said flames; L apparatusjOr producing carbon black including av collecting. plate, a gas sup- Ply. r p har n p u li yiofrb n 's 1W 7 through-each r separate electrode closely adjacent to each burner and connected to said pipe, said pipe and said plate beingconnected to opposite poles of a source of electrical energy. 8. An apparatus for producing free carbon, including a fuel supply pipe having a plurality of burners, a separate electrode closely adjacent to each burner, an electrode above the flames from the burners, and a source of electrical energy having one pole connected to said last mentioned electrode and the other pole to all of said first mentioned electrodes.

Signed at New York, in the county of New York and State of New York, this 29th day of September A. D. 1980.

GEORGE CHARLES LEWIS. 

